Method and apparatus for pattern detection
US5430548A · kind A · utility
40Cited by
12References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1993 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Feb 2, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/95607
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The inventive pattern detection method and apparatus produce, from an optical image of a pattern in attention and an optical image of a pattern which should be identical to the pattern in attention, an optical image by merging the images, with a relative phase shift being imposed, and pattern information is detected or observed in the merged optical image or a signal produced from the optical image through the conversion with an opto-electric transducer means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.